Allow basic multi-^K cuts to be redone properly. Code getting uglier by the second.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4288 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

src/nano.h

@@ -274,7 +274,8 @@ typedef struct undo {
 	/* copy copy copy */
     ssize_t mark_begin_x;
 	/* Another shadow variable */
-
+    ssize_t linescut;
+	/* How many lines we cut on a straight non-marked non-to-end cut */
     struct undo *next;
 } undo;
 

src/text.c

@@ -443,12 +443,17 @@ void do_undo(void)
     case CUTTOEND:
 	undidmsg = _("text cut");
 	cutbuffer = copy_filestruct(u->cutbuffer);
+
+        /* Compute cutbottom for the uncut using out copy */
 	for (cutbottom = cutbuffer; cutbottom->next != NULL; cutbottom = cutbottom->next)
 	    ;
+
+	/* Get to where we need to uncut from */
 	if (u->mark_set && u->mark_begin_lineno < u->lineno)
 	    do_gotolinecolumn(u->mark_begin_lineno, u->mark_begin_x+1, FALSE, FALSE, FALSE, FALSE);
 	else
 	    do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
+
 	do_uncut_text();
 	free_filestruct(cutbuffer);
 	cutbuffer = NULL;
@@ -548,19 +553,39 @@ void do_redo(void)
 	undidmsg = _("line cut");
 	do_gotolinecolumn(u->lineno, u->begin+1, FALSE, FALSE, FALSE, FALSE);
 	openfile->mark_set = u->mark_set;
-	t = cutbuffer;
+	if (cutbuffer)
+	    free(cutbuffer);
 	cutbuffer = NULL;
+
+	/* Move ahead the same # lines we had if a marked cut */
 	if (u->mark_set) {
 	    for (i = 1, t = openfile->fileage; i != u->mark_begin_lineno; i++)
 		t = t->next;
 	    openfile->mark_begin = t;
+	} else if (!u->to_end) {
+	    /* Here we have a regular old potentially multi-line ^K cut.  We'll
+		need to trick nano into thinking it's a marked cut to cut more
+		than one line again */
+#ifdef DEBUG
+	    fprintf(stderr, "Undoing multi-^K cut, u->linescut = %d\n", u->linescut);
+#endif
+	    for (i = 0, t = openfile->current; i < u->linescut; i++) {
+
+#ifdef DEBUG
+	    fprintf(stderr, "Advancing, lineno  = %d, data = \"%s\"\n", t->lineno, t->data);
+#endif
+		t = t->next;
+	    }
+	    openfile->mark_begin = t;
+	    openfile->mark_begin_x = 0;
+	    openfile->mark_set = TRUE;
 	}
+
 	openfile->mark_begin_x = u->mark_begin_x;
 	do_cut_text(FALSE, u->to_end, TRUE);
 	openfile->mark_set = FALSE;
         openfile->mark_begin = NULL;
         openfile->mark_begin_x = 0;
-	cutbuffer = t;
 	edit_refresh();
 	break;
     default:
@@ -766,6 +791,9 @@ void add_undo(undo_type current_action, openfilestruct *fs)
     u->strdata = NULL;
     u->cutbuffer = NULL;
     u->cutbottom  = NULL;
+    u->mark_begin_lineno = 0;
+    u->mark_begin_x = 0;
+    u->linescut = 0;
     u->xflags = 0;
 
     switch (u->type) {
@@ -908,6 +936,7 @@ void update_undo(undo_type action, openfilestruct *fs)
 	    free(u->cutbuffer);
 	u->cutbuffer = copy_filestruct(cutbuffer);
 	u->cutbottom = cutbottom;
+	u->linescut++;
 	break;
     case SPLIT:
     case UNSPLIT: